Answer:
The Chinese exported silk, teas, salt, sugar, porcelain, and spices. Most of what was traded was expensive luxury goods. This was because it was a long trip and merchants didn't have a lot of room for goods. They imported, or bought, goods like cotton, ivory, wool, gold, and silver
The correct answer is serotonin.
Serotonin is a neurotransmitter (NT) produced in the human body. It is known as the "happiness" or "feel good" chemical. Many mood altering drugs and illicit substances like hallucinogens, antidepressants and stimulants interact with serotonin in the brain, which in turn alters people's moods, making them feel good and happy while consuming these substances.
The answer you're looking for is C:)
